Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Fallopia sachalinensis (F.W.Schmidt ex Maxim.) Nakai image
Photographer: Emmet J. Judziewicz           

Emmet J. Judziewicz

Emmet J. Judziewicz

Emmet J. Judziewicz

Emmet J. Judziewicz
Family Polygonaceae
Fallopia sachalinensis (F.W.Schmidt ex Maxim.) Nakai
giant knotweed
Fallopia: for Gabriello (Gabriele) Fallopia, 16th century Italian anatomist who discovered fallopian tubes
sachalinensis: of the island of Sakhalin, north of Japan
  Prohibited Invasive - Eradicate!  Stop It symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - persisting and spreading; ecologically invasive
Plant: erect to arching, perennial, 4'-10' tall, stout, shrub-like forb; long rhizomes forming clones to several acres; stems angular
Flower: white to greenish, 5-parted, petals and petal-like sepals; inflorescence many 3"-6" branched clusters from the upper leaf axils
Fruit:dry seed
Leaf:alternate, up to 12" long, oval with a gradually tapering tip and a heart-shaped base
Habitat: shores, grasslands, woods

More Information Natural Communities Herbarium Specimens
All Fallopia list Google- Images or Text

Flora of North America (off site)
Pleuropterus sachalinensis (F.W.Schmidt ex Maxim.) H.Gross
Polygonum sachalinense F.W.Schmidt ex Maxim.
Reynoutria sachalinensis (F.W.Schmidt ex Maxim.) Nakai
Tiniaria sachalinensis (F.W.Schmidt ex Maxim.) Janch.

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